1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 1997 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */ 28 /* All Rights Reserved */ 29 30 /* 31 * University Copyright- Copyright (c) 1982, 1986, 1988 32 * The Regents of the University of California 33 * All Rights Reserved 34 * 35 * University Acknowledgment- Portions of this document are derived from 36 * software developed by the University of California, Berkeley, and its 37 * contributors. 38 */ 39 40 #ifndef _SYS_IOCCOM_H 41 #define _SYS_IOCCOM_H 42 43 #pragma ident "%Z%%M% %I% %E% SMI" 44 45 #ifdef __cplusplus 46 extern "C" { 47 #endif 48 49 /* 50 * Ioctl's have the command encoded in the lower word, 51 * and the size of any in or out parameters in the upper 52 * word. The high 2 bits of the upper word are used 53 * to encode the in/out status of the parameter; for now 54 * we restrict parameters to at most 255 bytes. 55 */ 56 #define IOCPARM_MASK 0xff /* parameters must be < 256 bytes */ 57 #define IOC_VOID 0x20000000 /* no parameters */ 58 #define IOC_OUT 0x40000000 /* copy out parameters */ 59 #define IOC_IN 0x80000000 /* copy in parameters */ 60 #define IOC_INOUT (IOC_IN|IOC_OUT) 61 62 /* 63 * The 0x20000000 is so we can distinguish new ioctl's from old. 64 */ 65 #define _IO(x, y) (IOC_VOID|(x<<8)|y) 66 #define _IOR(x, y, t) \ 67 ((int)((uint32_t) \ 68 (IOC_OUT|(((sizeof (t))&IOCPARM_MASK)<<16)|(x<<8)|y))) 69 70 #define _IORN(x, y, t) ((int)((uint32_t)(IOC_OUT|(((t)&IOCPARM_MASK)<<16)| \ 71 (x<<8)|y))) 72 73 #define _IOW(x, y, t) \ 74 ((int)((uint32_t)(IOC_IN|(((sizeof (t))&IOCPARM_MASK)<<16)| \ 75 (x<<8)|y))) 76 77 #define _IOWN(x, y, t) ((int32_t)(uint32_t)(IOC_IN|(((t)&IOCPARM_MASK)<<16)| \ 78 (x<<8)|y)) 79 80 #define _IOWR(x, y, t) \ 81 ((int)((uint32_t)(IOC_INOUT|(((sizeof (t))&IOCPARM_MASK)<<16)| \ 82 (x<<8)|y))) 83 84 #define _IOWRN(x, y, t) \ 85 ((int)((uint32_t)(IOC_INOUT|(((t)&IOCPARM_MASK)<<16)| \ 86 (x<<8)|y))) 87 88 #ifdef __cplusplus 89 } 90 #endif 91 92 #endif /* _SYS_IOCCOM_H */ 93